Changes in Peroxidase Isozymes in Mangrove Species (Avicennia marina) After Exposure to Heavy Metals and Oil Pollutants

Since mangrove forests are locating in intertidle zone, they had evolved specific adaptations to survive rough environmental conditions such as floods, hurricanes and hypersalinity. Undesirable conditions (like huge installations of the oil companies, overgrazing …) will accelerate destroying rate of the forests. In present study, isoenzymatic variation of 60 individuals of Avicennia marina determined. NTSYS software (pc-2.02e) with UPGMA program and Jaccard coefficient classified the genotypes. Then, these enzymatic groups of Avicennia marina lied on the pollution stresses. Qualitative studies of peroxidases showed individuals sensitive to pollutants in a short time. Among all the treatments NiCl2, and oil & gasoline complex and mixture treatments put the minimum and maximum effect, respectively. CdCl2, PbNo3 and HgSo4 didnt show constant behaviour during the times and individuals, as the time of the treatments increase, peroxidase activity will decrease following an initial increase.